Perhaps you should try some spelling variations:
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level modeling algorithm" (Expand Search), "level finding algorithm" (Expand Search), "level according algorithm" (Expand Search), "level using algorithm" (Expand Search)
"elements wold algorithm" » "elements rl algorithm" (Expand Search), "elements box algorithm" (Expand Search), "elements colony algorithm" (Expand Search), "elements wt algorithm" (Expand Search)
"element two algorithms" » "element ml algorithms" (Expand Search), "element _ algorithms" (Expand Search), "element art algorithms" (Expand Search), "element te algorithms" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements wold algorithm") OR ("element two algorithms"))) OR ("level coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements wold algorithm\") OR (\"element two algorithms\"))) OR (\"level coding algorithm\"))".
• Removing quotes may allow a broader search: (((( elements wold algorithm ) OR ( element two algorithms ))) OR ( level coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements wold algorithm") OR ("element two algorithms"))) OR ("level coding algorithm"))*.